Apparatus for developing an electrostatic latent image with a non-magnetic toner

A developing apparatus comprising:

• a toner reservoir for holding a non-magnetic toner,
• a toner supply roller including a substantially cylindrical supply surface for receiving the toner from the toner reservoir and electrifying the toner thereon,
• an electrostatic latent image carrier including a latent image surface on which a latent image formed by an electrostatic voltage distribution thereon is developed by the toner transferred from the supply surface, and
• a toner seal surface arranged adjacent to the toner supply roller to contact a remaining part of the toner on the supply surface after the latent image development so that the remaining part of the toner is taken into the toner reservoir,
• wherein a disturbance of toner condition between the toner and toner seal surface is prevented and the toner seal surface is made of a fluorine compound and the toner is electrified on the supply roller to have positive electricity.

A developing apparatus comprising:

• a toner reservoir for holding a non-magnetic toner,
• a toner supply roller including a substantially cylindrical supply surface for receiving the toner from the toner reservoir and electrifying the toner thereon,
• an electrostatic latent image carrier including a latent image surface on which a latent image formed by an electrostatic voltage distribution thereon is developed by the toner transferred from the supply surface, and
• a toner seal surface arranged adjacent to the toner supply roller to contact a remaining part of the toner on the supply surface after the latent image development so that the remaining part of the toner is taken into the toner reservoir,
• wherein a disturbance of toner condition between the toner and toner seal surface is prevented and when the toner is electrified on the supply roller to have positive electricity, the toner seal surface is arranged between the toner and a negative end with respect to a series of frictional electrification.

A developing apparatus comprising:

• a toner reservoir for holding a non-magnetic toner,
• a toner supply roller including a substantially cylindrical supply surface for receiving the toner from the toner reservoir and electrifying the toner thereon,
• an electrostatic latent image carrier including a latent image surface on which a latent image formed by an electrostatic voltage distribution thereon is developed by the toner transferred from the supply surface, and
• a toner seal surface arranged adjacent to the toner supply roller to contact a remaining part of the toner on the supply surface after the latent image development so that the remaining part of the toner is taken into the toner reservoir,
• wherein a disturbance of toner condition between the toner and toner seal surface is prevented and when the toner is electrified on the supply roller to have negative electricity, the toner seal surface is arranged between the toner and a positive end with respect to a series of frictional electrification.